Significant friction reduction of high-intensity pulsed ion beam irradiated WC-Ni against graphite under water lubrication
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Two types of commercial WC-Ni samples were irradiated with the High-intensity pulsed ion beam (HIPIB). Both the surface characteristics and tribo-characteristics of the non-irradiated and irradiated WC-Ni samples, sliding against graphite under water lubrication, were compared. Quite low steady friction coefficients (approximately of 0.02) of the irradiated WC-Ni were observed. The surface topographies and components were investigated. The quite low friction of the irradiated WC-Ni samples was ascribed to the higher fluid retention capability of the latter and the tribofilm formed during sliding.
KeywordsWC-Ni high-intensity-pulsed ion beam (HIPIB) low friction
The authors are grateful to the Key Lab of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education) for the HIPIB irradiation execution contribution and to Professor X. P. Zhu and M. K. Lei for their discussions and suggestions. This work was financially supported by both the National Basic Research Program of China (973) (Grant No. 2015CB057303) and the National Natural Science Foundation of China (Grant No. 51275268).
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